feat: clone registrar from 2U fork #171

Job	Run time
run_ci (ubuntu-20.04, 3.11, discovery+lms+forum)	21m 0s
run_ci (ubuntu-20.04, 3.11, discovery+lms+forum)	21m 0s
run_ci (ubuntu-20.04, 3.11, registrar+lms)	22m 9s
run_ci (ubuntu-20.04, 3.11, registrar+lms)	17m 9s
run_ci (ubuntu-20.04, 3.11, ecommerce+lms)	22m 4s
run_ci (ubuntu-20.04, 3.11, ecommerce+lms)	22m 4s
run_ci (ubuntu-20.04, 3.11, edx_notes_api+lms)	18m 17s
run_ci (ubuntu-20.04, 3.11, edx_notes_api+lms)	18m 17s
run_ci (ubuntu-20.04, 3.11, credentials+lms)	17m 2s
run_ci (ubuntu-20.04, 3.11, credentials+lms)	17m 2s
run_ci (ubuntu-20.04, 3.11, xqueue)	2m 54s
run_ci (ubuntu-20.04, 3.11, xqueue)	2m 54s
run_ci (ubuntu-20.04, 3.11, analyticsapi+insights+lms)	22m 54s
run_ci (ubuntu-20.04, 3.11, analyticsapi+insights+lms)	22m 54s
	4h 7m 40s

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